/* 简化版 Bootstrap CSS - 基本样式恢复 */
:root {
  --bs-blue: #0d6efd;
  --bs-green: #198754;
  --bs-red: #dc3545;
  --bs-yellow: #ffc107;
  --bs-gray-100: #f8f9fa;
  --bs-gray-200: #e9ecef;
  --bs-gray-300: #dee2e6;
  --bs-gray-400: #ced4da;
  --bs-gray-500: #adb5bd;
  --bs-gray-600: #6c757d;
  --bs-gray-700: #495057;
  --bs-gray-800: #343a40;
  --bs-gray-900: #212529;
  --bs-white: #fff;
  --bs-black: #000;
  --bs-border-radius: 0.375rem;
  --bs-border-color: var(--bs-gray-300);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--bs-gray-900);
  background-color: var(--bs-white);
}

/* 容器类 */
.container {
  width: 100%;
  padding-right: 0.75rem;
  padding-left: 0.75rem;
  margin-right: auto;
  margin-left: auto;
}

@media (min-width: 576px) { .container { max-width: 540px; } }
@media (min-width: 768px) { .container { max-width: 720px; } }
@media (min-width: 992px) { .container { max-width: 960px; } }
@media (min-width: 1200px) { .container { max-width: 1140px; } }

/* 栅格系统 */
.row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -0.75rem;
  margin-left: -0.75rem;
}

.col {
  flex: 1 0 0%;
  padding-right: 0.75rem;
  padding-left: 0.75rem;
}

.col-1 { flex: 0 0 auto; width: 8.33333333%; }
.col-2 { flex: 0 0 auto; width: 16.66666667%; }
.col-3 { flex: 0 0 auto; width: 25%; }
.col-4 { flex: 0 0 auto; width: 33.33333333%; }
.col-5 { flex: 0 0 auto; width: 41.66666667%; }
.col-6 { flex: 0 0 auto; width: 50%; }
.col-7 { flex: 0 0 auto; width: 58.33333333%; }
.col-8 { flex: 0 0 auto; width: 66.66666667%; }
.col-9 { flex: 0 0 auto; width: 75%; }
.col-10 { flex: 0 0 auto; width: 83.33333333%; }
.col-11 { flex: 0 0 auto; width: 91.66666667%; }
.col-12 { flex: 0 0 auto; width: 100%; }

/* 间距工具类 */
.m-0 { margin: 0 !important; }
.m-1 { margin: 0.25rem !important; }
.m-2 { margin: 0.5rem !important; }
.m-3 { margin: 1rem !important; }
.m-4 { margin: 1.5rem !important; }
.m-5 { margin: 3rem !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: 0.25rem !important; }
.p-2 { padding: 0.5rem !important; }
.p-3 { padding: 1rem !important; }
.p-4 { padding: 1.5rem !important; }
.p-5 { padding: 3rem !important; }

/* 显示工具类 */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }

/* Flex布局工具类 */
.flex-row { flex-direction: row !important; }
.flex-column { flex-direction: column !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-between { justify-content: space-between !important; }
.justify-content-around { justify-content: space-around !important; }
.align-items-center { align-items: center !important; }
.align-items-start { align-items: flex-start !important; }
.align-items-end { align-items: flex-end !important; }

/* 文本工具类 */
.text-center { text-align: center !important; }
.text-start { text-align: left !important; }
.text-end { text-align: right !important; }
.text-primary { color: var(--bs-blue) !important; }
.text-secondary { color: var(--bs-gray-600) !important; }
.text-success { color: var(--bs-green) !important; }
.text-danger { color: var(--bs-red) !important; }
.text-warning { color: var(--bs-yellow) !important; }
.text-muted { color: var(--bs-gray-500) !important; }
.text-white { color: var(--bs-white) !important; }
.text-dark { color: var(--bs-gray-900) !important; }
.text-light { color: var(--bs-gray-100) !important; }

/* 背景工具类 */
.bg-primary { background-color: var(--bs-blue) !important; }
.bg-secondary { background-color: var(--bs-gray-600) !important; }
.bg-success { background-color: var(--bs-green) !important; }
.bg-danger { background-color: var(--bs-red) !important; }
.bg-warning { background-color: var(--bs-yellow) !important; }
.bg-info { background-color: #0dcaf0 !important; }
.bg-light { background-color: var(--bs-gray-100) !important; }
.bg-dark { background-color: var(--bs-gray-900) !important; }
.bg-white { background-color: var(--bs-white) !important; }

/* 边框工具类 */
.border { border: 1px solid var(--bs-border-color) !important; }
.border-0 { border: 0 !important; }
.border-top { border-top: 1px solid var(--bs-border-color) !important; }
.border-bottom { border-bottom: 1px solid var(--bs-border-color) !important; }
.border-left { border-left: 1px solid var(--bs-border-color) !important; }
.border-right { border-right: 1px solid var(--bs-border-color) !important; }

/* 圆角工具类 */
.rounded { border-radius: var(--bs-border-radius) !important; }
.rounded-0 { border-radius: 0 !important; }
.rounded-circle { border-radius: 50% !important; }

/* 阴影工具类 */
.shadow { box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important; }
.shadow-sm { box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important; }
.shadow-lg { box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175) !important; }

/* 表格样式 */
.table {
  width: 100%;
  margin-bottom: 1rem;
  color: var(--bs-gray-900);
  border-collapse: collapse;
}

.table th, .table td {
  padding: 0.75rem;
  vertical-align: top;
  border-top: 1px solid var(--bs-border-color);
}

.table thead th {
  vertical-align: bottom;
  background-color: var(--bs-gray-100);
  border-bottom: 2px solid var(--bs-border-color);
}

.table-hover tbody tr:hover {
  background-color: var(--bs-gray-100);
}

.table-striped tbody tr:nth-of-type(odd) {
  background-color: rgba(0, 0, 0, 0.05);
}

/* 按钮样式 */
.btn {
  display: inline-block;
  font-weight: 400;
  color: var(--bs-gray-900);
  text-align: center;
  text-decoration: none;
  vertical-align: middle;
  cursor: pointer;
  border: 1px solid transparent;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: var(--bs-border-radius);
  transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out;
}

.btn-primary { color: var(--bs-white); background-color: var(--bs-blue); border-color: var(--bs-blue); }
.btn-secondary { color: var(--bs-white); background-color: var(--bs-gray-600); border-color: var(--bs-gray-600); }
.btn-success { color: var(--bs-white); background-color: var(--bs-green); border-color: var(--bs-green); }
.btn-danger { color: var(--bs-white); background-color: var(--bs-red); border-color: var(--bs-red); }
.btn-warning { color: var(--bs-gray-900); background-color: var(--bs-yellow); border-color: var(--bs-yellow); }
.btn-info { color: var(--bs-white); background-color: #0dcaf0; border-color: #0dcaf0; }
.btn-light { color: var(--bs-gray-900); background-color: var(--bs-gray-100); border-color: var(--bs-gray-100); }
.btn-dark { color: var(--bs-white); background-color: var(--bs-gray-900); border-color: var(--bs-gray-900); }
.btn-link { color: var(--bs-blue); background-color: transparent; border-color: transparent; }

/* 按钮大小 */
.btn-sm { padding: 0.25rem 0.5rem; font-size: 0.875rem; border-radius: 0.25rem; }
.btn-lg { padding: 0.5rem 1rem; font-size: 1.25rem; border-radius: 0.5rem; }
.btn-block { display: block; width: 100%; }

/* 表单控件 */
.form-control {
  display: block;
  width: 100%;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--bs-gray-900);
  background-color: var(--bs-white);
  background-clip: padding-box;
  border: 1px solid var(--bs-border-color);
  border-radius: var(--bs-border-radius);
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
  color: var(--bs-gray-900);
  background-color: var(--bs-white);
  border-color: var(--bs-blue);
  outline: 0;
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* 卡片样式 */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  word-wrap: break-word;
  background-color: var(--bs-white);
  background-clip: border-box;
  border: 1px solid var(--bs-border-color);
  border-radius: var(--bs-border-radius);
}

.card-body {
  flex: 1 1 auto;
  padding: 1rem;
}

.card-header {
  padding: 0.5rem 1rem;
  margin-bottom: 0;
  background-color: var(--bs-gray-100);
  border-bottom: 1px solid var(--bs-border-color);
}

.card-footer {
  padding: 0.5rem 1rem;
  background-color: var(--bs-gray-100);
  border-top: 1px solid var(--bs-border-color);
}

/* 徽章样式 */
.badge {
  display: inline-block;
  padding: 0.25em 0.4em;
  font-size: 0.75em;
  font-weight: 700;
  line-height: 1;
  color: var(--bs-white);
  background-color: var(--bs-gray-700);
  text-align: center;
  white-space: nowrap;
  vertical-align: baseline;
  border-radius: 0.25rem;
}

.badge-primary { background-color: var(--bs-blue); }
.badge-secondary { background-color: var(--bs-gray-600); }
.badge-success { background-color: var(--bs-green); }
.badge-danger { background-color: var(--bs-red); }
.badge-warning { background-color: var(--bs-yellow); color: var(--bs-gray-900); }
.badge-info { background-color: #0dcaf0; }
.badge-light { background-color: var(--bs-gray-100); color: var(--bs-gray-900); }
.badge-dark { background-color: var(--bs-gray-900); }

/* 警告框样式 */
.alert {
  position: relative;
  padding: 1rem 1rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
  border-radius: var(--bs-border-radius);
}

.alert-primary { color: #084298; background-color: #cfe2ff; border-color: #b6d4fe; }
.alert-secondary { color: #41464b; background-color: #e2e3e5; border-color: #d3d6d8; }
.alert-success { color: #0f5132; background-color: #d1e7dd; border-color: #badbcc; }
.alert-danger { color: #842029; background-color: #f8d7da; border-color: #f5c2c7; }
.alert-warning { color: #664d03; background-color: #fff3cd; border-color: #ffecb5; }
.alert-info { color: #055160; background-color: #cff4fc; border-color: #b6effb; }
.alert-light { color: #6c757d; background-color: #f8f9fa; border-color: #f8f9fa; }
.alert-dark { color: #14213d; background-color: #d3d3d3; border-color: #bcbcbc; }

/* 导航栏样式 */
.navbar {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  background-color: var(--bs-white);
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.navbar-brand {
  display: inline-block;
  padding-top: 0.3125rem;
  padding-bottom: 0.3125rem;
  margin-right: 1rem;
  font-size: 1.25rem;
  line-height: inherit;
  white-space: nowrap;
  text-decoration: none;
  color: var(--bs-gray-900);
}

.navbar-nav {
  display: flex;
  flex-direction: column;
  padding-left: 0;
  margin-bottom: 0;
  list-style: none;
}

.nav-link {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--bs-gray-700);
  text-decoration: none;
  transition: color 0.15s ease-in-out;
}

.nav-link:hover, .nav-link:focus {
  color: var(--bs-blue);
}

/* 响应式导航栏 */
@media (min-width: 768px) {
  .navbar-expand-md .navbar-nav {
    flex-direction: row;
  }
  
  .navbar-expand-md .nav-link {
    padding-right: 0.5rem;
    padding-left: 0.5rem;
  }
}

/* 分页样式 */
.pagination {
  display: flex;
  padding-left: 0;
  list-style: none;
  border-radius: var(--bs-border-radius);
}

.page-item .page-link {
  position: relative;
  display: block;
  padding: 0.5rem 0.75rem;
  margin-left: -1px;
  line-height: 1.25;
  color: var(--bs-blue);
  background-color: var(--bs-white);
  border: 1px solid var(--bs-border-color);
  text-decoration: none;
}

.page-item:first-child .page-link {
  margin-left: 0;
  border-top-left-radius: var(--bs-border-radius);
  border-bottom-left-radius: var(--bs-border-radius);
}

.page-item:last-child .page-link {
  border-top-right-radius: var(--bs-border-radius);
  border-bottom-right-radius: var(--bs-border-radius);
}

.page-item.active .page-link {
  z-index: 3;
  color: var(--bs-white);
  background-color: var(--bs-blue);
  border-color: var(--bs-blue);
}

/* 模态框样式 */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1050;
  display: none;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: rgba(0, 0, 0, 0.5);
}

.modal-dialog {
  position: relative;
  width: auto;
  margin: 0.5rem;
  pointer-events: none;
}

.modal-content {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  pointer-events: auto;
  background-color: var(--bs-white);
  background-clip: padding-box;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: var(--bs-border-radius);
  outline: 0;
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 1rem;
  border-bottom: 1px solid var(--bs-border-color);
  border-top-left-radius: calc(var(--bs-border-radius) - 1px);
  border-top-right-radius: calc(var(--bs-border-radius) - 1px);
}

.modal-body {
  position: relative;
  flex: 1 1 auto;
  padding: 1rem;
}

.modal-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  padding: 1rem;
  border-top: 1px solid var(--bs-border-color);
  border-bottom-right-radius: calc(var(--bs-border-radius) - 1px);
  border-bottom-left-radius: calc(var(--bs-border-radius) - 1px);
}

/* 工具提示样式 */
.tooltip {
  position: absolute;
  z-index: 1070;
  display: block;
  margin: 0;
  font-family: var(--bs-font-sans-serif);
  font-style: normal;
  font-weight: 400;
  line-height: 1.5;
  text-align: left;
  text-align: start;
  text-decoration: none;
  text-shadow: none;
  text-transform: none;
  letter-spacing: normal;
  word-break: normal;
  word-spacing: normal;
  white-space: normal;
  line-break: auto;
  font-size: 0.75rem;
  word-wrap: break-word;
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

.tooltip.show {
  opacity: 1;
}

/* 下拉菜单样式 */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  display: none;
  float: left;
  min-width: 10rem;
  padding: 0.5rem 0;
  margin: 0.125rem 0 0;
  font-size: 1rem;
  color: var(--bs-gray-700);
  text-align: left;
  list-style: none;
  background-color: var(--bs-white);
  background-clip: padding-box;
  border: 1px solid var(--bs-border-color);
  border-radius: var(--bs-border-radius);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.dropdown-menu.show {
  display: block;
}

.dropdown-item {
  display: block;
  width: 100%;
  padding: 0.25rem 1rem;
  clear: both;
  font-weight: 400;
  color: var(--bs-gray-700);
  text-align: inherit;
  text-decoration: none;
  white-space: nowrap;
  background-color: transparent;
  border: 0;
  cursor: pointer;
}

.dropdown-item:hover, .dropdown-item:focus {
  color: var(--bs-gray-900);
  background-color: var(--bs-gray-100);
}

/* 折叠面板样式 */
.collapse:not(.show) {
  display: none;
}

.collapsing {
  height: 0;
  overflow: hidden;
  transition: height 0.35s ease;
}

/* 旋转动画 */
@keyframes spinner-border {
  to { transform: rotate(360deg); }
}

.spinner-border {
  display: inline-block;
  width: 2rem;
  height: 2rem;
  vertical-align: text-bottom;
  border: 0.25em solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spinner-border 0.75s linear infinite;
}

/* 加载动画 */
@keyframes spinner-grow {
  0% { transform: scale(0); }
  50% { opacity: 1; }
}

.spinner-grow {
  display: inline-block;
  width: 2rem;
  height: 2rem;
  vertical-align: text-bottom;
  background-color: currentColor;
  border-radius: 50%;
  opacity: 0;
  animation: spinner-grow 0.75s linear infinite;
}

/* 进度条样式 */
.progress {
  height: 1rem;
  overflow: hidden;
  font-size: 0.75rem;
  background-color: var(--bs-gray-200);
  border-radius: var(--bs-border-radius);
}

.progress-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--bs-white);
  text-align: center;
  white-space: nowrap;
  background-color: var(--bs-blue);
  transition: width 0.6s ease;
}

/* 图片样式 */
.img-fluid {
  max-width: 100%;
  height: auto;
}

.img-thumbnail {
  padding: 0.25rem;
  background-color: var(--bs-white);
  border: 1px solid var(--bs-border-color);
  border-radius: 0.375rem;
  max-width: 100%;
  height: auto;
}

/* 响应式工具类 */
@media (max-width: 575.98px) {
  .d-sm-none { display: none !important; }
  .d-sm-block { display: block !important; }
}

@media (max-width: 767.98px) {
  .d-md-none { display: none !important; }
  .d-md-block { display: block !important; }
}

@media (max-width: 991.98px) {
  .d-lg-none { display: none !important; }
  .d-lg-block { display: block !important; }
}

@media (max-width: 1199.98px) {
  .d-xl-none { display: none !important; }
  .d-xl-block { display: block !important; }
}

/* 打印样式 */
@media print {
  * {
    text-shadow: none !important;
    box-shadow: none !important;
  }
  
  .container {
    width: auto;
    max-width: 100%;
  }
  
  .table {
    border-collapse: collapse !important;
  }
  
  .table td,
  .table th {
    background-color: var(--bs-white) !important;
  }
}